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19 June, 19:52

what is the average speed of (a) a car that travels 400m in 20s. and (b) an athlete who runs 1500m in 4 minutes

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  1. 19 June, 22:30
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    a) 20 m/s

    b) 37.5 m) s

    Explanation:

    Average speed = total distance : total time

    => (a) average speed of a car that travels 400m in 20s

    = 400/20 = 20 m/s

    & (b) average speed of an athlete who runs 1500m in 4 minutes (or 4*60=240 seconds)

    = 1500/240 = 37.5 m/s
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